{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-66395 exists.","fix":"No fix has been published for CVE-2026-66395 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-66395 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-66395 and fix it if it is affected.\n\nWhat it is: CVE-2026-66395 is a critical cross-site scripting vulnerability in siyuan-note siyuan, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-66395 exists.\n\nAffected product: siyuan-note siyuan. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-66395/ (Markdown: https://insights.sbomify.com/CVE-2026-66395/index.md)","id":"CVE-2026-66395","markdown":"https://insights.sbomify.com/CVE-2026-66395/index.md","name":"CVE-2026-66395","record":{"aliases":["GHSA-6gx2-8gcr-x83f","GHSA-x52j-m89g-wh64"],"analysis":{"component_type":"desktop_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"SiYuan Desktop","requires_auth":"none","summary":"Attackers can execute arbitrary code with Node.js privileges by crafting malicious deep links that trigger reflected XSS in the plugin readme handler.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.4,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"SiYuan desktop before v3.7.2 contains a reflected cross-site scripting vulnerability in the bazaar plugin readme handler that allows attackers to execute arbitrary code by crafting a malicious siyuan:// deep link. Attackers can inject HTML payloads via the plugin name parameter that execute with full Node.js access through insertAdjacentHTML rendering in an insecurely configured Electron renderer.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"SiYuan Desktop before v3.7.2 Reflected XSS to RCE via siyuan Protocol","id":"CVE-2026-66395","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"SiYuan before v3.7.2 Stored XSS to RCE via title-img IAL","id":"CVE-2026-66396"},"packages":[],"prev":{"headline":"SiYuan before v3.7.3 Stored and Reflected XSS via SVG Sanitizer Bypass","id":"CVE-2026-66394"},"products":["siyuan"],"published":"2026-07-27","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-17","vendors":["siyuan-note"]},"summary":"Attackers can execute arbitrary code with Node.js privileges by crafting malicious deep links that trigger reflected XSS in the plugin readme handler.","url":"https://insights.sbomify.com/CVE-2026-66395/"}